document.write( "Question 473082: Determine which pair of equations represent parallel lines and which pair represents perpendicular lines
\n" ); document.write( "7.
\n" ); document.write( "a. x + 2y = 5 ______________
\n" ); document.write( " y − 2x = 7
\n" ); document.write( "b.  2x + y = 7
\n" ); document.write( " −7y =14x−21
\n" ); document.write( "______________
\n" ); document.write( "c. x − y = 5 ______________
\n" ); document.write( "x + y = 7 \n" ); document.write( "

Algebra.Com's Answer #324383 by MathLover1(20850) $\"\"$ $\"About$

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